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# particleSize

The starting size of each particle.

```
var particleSize: CGSize { get set }
```

## Discussion

The default value is <doc://com.apple.documentation/documentation/CoreGraphics/CGSizeZero>. If set to the default, the size of the texture stored in the [`particleTexture`](/documentation/SpriteKit/SKEmitterNode/particleTexture) property is used to determine the size of a particle. If a texture has not been assigned, you must set this property to a non-empty size.

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